Listener "SoftDeleteableListener" was not added to the EventManager

Couldn't solve problem because of unclear answer.

To add softdeletable behaviour to your project add following lines to your config.yml

orm
  ..
  filters:
    softdeleteable:
      class: Gedmo\SoftDeleteable\Filter\SoftDeleteableFilter
      enabled: true

services:
  ..
  gedmo.listener.softdeleteable:
    class: Gedmo\SoftDeleteable\SoftDeleteableListener
    tags:
        - { name: doctrine.event_subscriber, connection: default }
    calls:
        - [ setAnnotationReader, [ '@annotation_reader' ] ]

Btw, more complete discussion, which helped me, can be found: https://github.com/Atlantic18/DoctrineExtensions/issues/380

See: https://github.com/stof/StofDoctrineExtensionsBundle/blob/master/Resources/doc/index.rst#activate-the-extensions-you-want

Add the following to your config.yml to activate the softdelete listener:

# app/config.yml
stof_doctrine_extensions:
    default_locale: %locale%
    orm:
        default:
            softdeleteable: true

If you are on api-platform This is my config/packages/doctrine.yml

doctrine:
    dbal:
        url: '%env(resolve:DATABASE_URL)%'

        # IMPORTANT: You MUST configure your server version,
        # either here or in the DATABASE_URL env var (see .env file)
        server_version: '12'
    orm:
        auto_generate_proxy_classes: true
        naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
        auto_mapping: true
        mappings:
            App:
                is_bundle: false
                type: annotation
                dir: '%kernel.project_dir%/src/Entity'
                prefix: 'App\Entity'
                alias: App
        filters:
            softdeleteable:
                class: Gedmo\SoftDeleteable\Filter\SoftDeleteableFilter
                enabled: true

after that add the new service to config.services.yml

services:   
    ..........
    ..........
    gedmo.listener.softdeleteable:
        class: Gedmo\SoftDeleteable\SoftDeleteableListener
        tags:
            - { name: doctrine.event_subscriber, connection: default }
        calls:
            - [ setAnnotationReader, [ '@annotation_reader' ] ]

Finally add the annotation to the entity

use Gedmo\Mapping\Annotation as Gedmo;

/**
* @ApiResource()
* @ORM\Entity(repositoryClass=StoreRepository::class)
* @ORM\Table(name="trn_stores")
* @Gedmo\SoftDeleteable(fieldName="deletedAt")
*/
class Store ...

That's it